For the field that is going to be the scanned data do the following:
- Under validation enable Unique in Table.
- Under After Scan enable AutoFind on Scan and Auto Submit.
For the field that will be incrementing do the following:
- Set Type to Variable.
- Set Data Type to Numeric.
- For default choose [*INCR: 1,1*].
*Note* - The [*INCR:1,1*] value can be modified to start at a certain number as well as increment by a cretain amount on each scan. The first 1 is the start on value, the second 1 is the amount you want to increment by. Ex: [*INCR:2,4*] would start the increment at 2 and increment by four on each scan. 2,6,10,14,.......